106 Mr. G. M. Mathews on the 



50. Egretta garzetta immaculata. Lesser Egret. 

 Herodias immaculata Gould, Birds Austr. vol. vi. 1846, 



pi. 58 : Port Essington. 



Fairly common, but difficult to obtain. 



51. Herodias alba syrmatophora. AVhite Egret. 

 Herodias syrmatophorus Gould, Birds Austr. vol. vi. 1816, 



pi. 56 : New South Wales. 



These birds are not numerous. They are very wary, and, 

 although scattered over the swamp, could only be seen 

 when they rose from the reeds, which in most places were 

 not very thick, but were tall enough to completely hide the 

 birds. 



52. Tonophoyx aruensis flavirostris. Pied Egret. 

 Notophoyx flavirostris Sharpe, Cat. Birds Brit. Mus. 



vol. xxvi. 1898, p. 651 : Fort Essington. 

 Hare. 



53. Demigretta greyi. White Reef-Heron. 



Herodias greyi Gould, Birds Austr. vol. vi. 181:8, pi. 61 : 

 Baine Island, Queensland. 

 Rare. 



54. Nycticorax caledonicus australasias. Night-Heron. 

 Ardea australasia Vieillot, Tabl. Encyc. Meth., Ornith. 



vol. iii. 1823, p. 1130 : New South Wales. 



These birds are rare on the Island. They were seen 

 in the mangroves and fresh-water creeks, and a few in the 

 great swamp. 



55. Butorides striata stagnatilis. Little Mangrove- 

 Bittern. 



Ardetta stagnatilis Gould, Proc. Zool. Soc. for 1847, 1848, 

 p. 221 : Port Essington. 



Often seen in the mangroves or along the tidal creeks. 



56. Dupetor flavicollis olivei. Northern Yellow-necked 

 Bittern. 



Ardeiralla flavicollis olivei Mathews, Nov. Zool. vol. xviii. 

 1912, p. 234 : Johnston River, Queensland. 



